tty: use u8 for flags

This makes all those 'char's an explicit 'u8'. This is part of the
continuing unification of chars and flags to be consistent u8.

This approaches tty_port_default_receive_buf().

Note that we do not change signedness as we compile with
-funsigned-char.

Signed-off-by: "Jiri Slaby (SUSE)" <jirislaby@kernel.org>
Cc: William Hubbs <w.d.hubbs@gmail.com>
Cc: Chris Brannon <chris@the-brannons.com>
Cc: Kirk Reiser <kirk@reisers.ca>
Cc: Samuel Thibault <samuel.thibault@ens-lyon.org>
Cc: Marcel Holtmann <marcel@holtmann.org>
Cc: Johan Hedberg <johan.hedberg@gmail.com>
Cc: Luiz Augusto von Dentz <luiz.dentz@gmail.com>
Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Eric Dumazet <edumazet@google.com>
Cc: Jakub Kicinski <kuba@kernel.org>
Cc: Paolo Abeni <pabeni@redhat.com>
Cc: Max Staudt <max@enpas.org>
Cc: Wolfgang Grandegger <wg@grandegger.com>
Cc: Marc Kleine-Budde <mkl@pengutronix.de>
Cc: Dario Binacchi <dario.binacchi@amarulasolutions.com>
Cc: Andreas Koensgen <ajk@comnets.uni-bremen.de>
Cc: Jeremy Kerr <jk@codeconstruct.com.au>
Cc: Matt Johnston <matt@codeconstruct.com.au>
Cc: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Cc: Liam Girdwood <lgirdwood@gmail.com>
Cc: Mark Brown <broonie@kernel.org>
Cc: Jaroslav Kysela <perex@perex.cz>
Cc: Takashi Iwai <tiwai@suse.com>
Acked-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20230810091510.13006-18-jirislaby@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

9 files changed, 14 insertions, 15 deletions

diff --git a/drivers/net/caif/caif_serial.c b/drivers/net/caif/caif_serial.c
index feda04dbe837..ed3a589def6b 100644
--- a/drivers/net/caif/caif_serial.c
+++ b/drivers/net/caif/caif_serial.c
@@ -159,7 +159,7 @@ static inline void debugfs_tx(struct ser_device *ser, const u8 *data, int size)
 #endif
 
 static void ldisc_receive(struct tty_struct *tty, const u8 *data,
-			  const char *flags, size_t count)
+			  const u8 *flags, size_t count)
 {
 	struct sk_buff *skb = NULL;
 	struct ser_device *ser;
diff --git a/drivers/net/can/can327.c b/drivers/net/can/can327.c
index a054f5fd0d43..24af63961030 100644
--- a/drivers/net/can/can327.c
+++ b/drivers/net/can/can327.c
@@ -886,7 +886,7 @@ static bool can327_is_valid_rx_char(u8 c)
  * functions may be called in parallel.
  */
 static void can327_ldisc_rx(struct tty_struct *tty, const u8 *cp,
-			    const char *fp, size_t count)
+			    const u8 *fp, size_t count)
 {
 	struct can327 *elm = tty->disc_data;
 	size_t first_new_char_idx;
diff --git a/drivers/net/can/slcan/slcan-core.c b/drivers/net/can/slcan/slcan-core.c
index fe5671dbeb77..24c6622d36bd 100644
--- a/drivers/net/can/slcan/slcan-core.c
+++ b/drivers/net/can/slcan/slcan-core.c
@@ -775,7 +775,7 @@ static const struct net_device_ops slcan_netdev_ops = {
  * in parallel
  */
 static void slcan_receive_buf(struct tty_struct *tty, const u8 *cp,
-			      const char *fp, size_t count)
+			      const u8 *fp, size_t count)
 {
 	struct slcan *sl = tty->disc_data;
 
diff --git a/drivers/net/hamradio/6pack.c b/drivers/net/hamradio/6pack.c
index 9a1f2a3f3b4f..6ed38a3cdd73 100644
--- a/drivers/net/hamradio/6pack.c
+++ b/drivers/net/hamradio/6pack.c
@@ -428,7 +428,7 @@ out:
  * and sent on to some IP layer for further processing.
  */
 static void sixpack_receive_buf(struct tty_struct *tty, const u8 *cp,
-				const char *fp, size_t count)
+				const u8 *fp, size_t count)
 {
 	struct sixpack *sp;
 	int count1;
diff --git a/drivers/net/hamradio/mkiss.c b/drivers/net/hamradio/mkiss.c
index 26dbcf49bfa6..5f38a002bd9e 100644
--- a/drivers/net/hamradio/mkiss.c
+++ b/drivers/net/hamradio/mkiss.c
@@ -875,7 +875,7 @@ static int mkiss_ioctl(struct tty_struct *tty, unsigned int cmd,
  * and sent on to the AX.25 layer for further processing.
  */
 static void mkiss_receive_buf(struct tty_struct *tty, const u8 *cp,
-			      const char *fp, size_t count)
+			      const u8 *fp, size_t count)
 {
 	struct mkiss *ax = mkiss_get(tty);
 
diff --git a/drivers/net/mctp/mctp-serial.c b/drivers/net/mctp/mctp-serial.c
index 5f809a18d308..5bf6fdff701c 100644
--- a/drivers/net/mctp/mctp-serial.c
+++ b/drivers/net/mctp/mctp-serial.c
@@ -391,7 +391,7 @@ static void mctp_serial_push(struct mctp_serial *dev, unsigned char c)
 }
 
 static void mctp_serial_tty_receive_buf(struct tty_struct *tty, const u8 *c,
-					const char *f, size_t len)
+					const u8 *f, size_t len)
 {
 	struct mctp_serial *dev = tty->disc_data;
 	int i;
diff --git a/drivers/net/ppp/ppp_async.c b/drivers/net/ppp/ppp_async.c
index a661ccdea6ab..cfd5cb609d99 100644
--- a/drivers/net/ppp/ppp_async.c
+++ b/drivers/net/ppp/ppp_async.c
@@ -98,7 +98,7 @@ static int ppp_async_send(struct ppp_channel *chan, struct sk_buff *skb);
 static int ppp_async_push(struct asyncppp *ap);
 static void ppp_async_flush_output(struct asyncppp *ap);
 static void ppp_async_input(struct asyncppp *ap, const unsigned char *buf,
-			    const char *flags, int count);
+			    const u8 *flags, int count);
 static int ppp_async_ioctl(struct ppp_channel *chan, unsigned int cmd,
 			   unsigned long arg);
 static void ppp_async_process(struct tasklet_struct *t);
@@ -330,7 +330,7 @@ ppp_asynctty_ioctl(struct tty_struct *tty, unsigned int cmd, unsigned long arg)
 
 /* May sleep, don't call from interrupt level or with interrupts disabled */
 static void
-ppp_asynctty_receive(struct tty_struct *tty, const u8 *buf, const char *cflags,
+ppp_asynctty_receive(struct tty_struct *tty, const u8 *buf, const u8 *cflags,
 		     size_t count)
 {
 	struct asyncppp *ap = ap_get(tty);
@@ -819,8 +819,7 @@ process_input_packet(struct asyncppp *ap)
    other ldisc functions but will not be re-entered */
 
 static void
-ppp_async_input(struct asyncppp *ap, const u8 *buf, const char *flags,
-		int count)
+ppp_async_input(struct asyncppp *ap, const u8 *buf, const u8 *flags, int count)
 {
 	struct sk_buff *skb;
 	int c, i, j, n, s, f;
diff --git a/drivers/net/ppp/ppp_synctty.c b/drivers/net/ppp/ppp_synctty.c
index 2a5cf6be9591..164c9053f73b 100644
--- a/drivers/net/ppp/ppp_synctty.c
+++ b/drivers/net/ppp/ppp_synctty.c
@@ -93,7 +93,7 @@ static int ppp_sync_ioctl(struct ppp_channel *chan, unsigned int cmd,
 static void ppp_sync_process(struct tasklet_struct *t);
 static int ppp_sync_push(struct syncppp *ap);
 static void ppp_sync_flush_output(struct syncppp *ap);
-static void ppp_sync_input(struct syncppp *ap, const u8 *buf, const char *flags,
+static void ppp_sync_input(struct syncppp *ap, const u8 *buf, const u8 *flags,
 			   int count);
 
 static const struct ppp_channel_ops sync_ops = {
@@ -323,7 +323,7 @@ ppp_synctty_ioctl(struct tty_struct *tty, unsigned int cmd, unsigned long arg)
 
 /* May sleep, don't call from interrupt level or with interrupts disabled */
 static void
-ppp_sync_receive(struct tty_struct *tty, const u8 *buf, const char *cflags,
+ppp_sync_receive(struct tty_struct *tty, const u8 *buf, const u8 *cflags,
 		 size_t count)
 {
 	struct syncppp *ap = sp_get(tty);
@@ -655,7 +655,7 @@ ppp_sync_flush_output(struct syncppp *ap)
  * frame is considered to be in error and is tossed.
  */
 static void
-ppp_sync_input(struct syncppp *ap, const u8 *buf, const char *flags, int count)
+ppp_sync_input(struct syncppp *ap, const u8 *buf, const u8 *flags, int count)
 {
 	struct sk_buff *skb;
 	unsigned char *p;
diff --git a/drivers/net/slip/slip.c b/drivers/net/slip/slip.c
index 7bfa90724e7b..e4280e37fec9 100644
--- a/drivers/net/slip/slip.c
+++ b/drivers/net/slip/slip.c
@@ -685,8 +685,8 @@ static void sl_setup(struct net_device *dev)
  * in parallel
  */
 
-static void slip_receive_buf(struct tty_struct *tty, const u8 *cp,
-			     const char *fp, size_t count)
+static void slip_receive_buf(struct tty_struct *tty, const u8 *cp, const u8 *fp,
+			     size_t count)
 {
 	struct slip *sl = tty->disc_data;